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  1. OPTs With Multiple Secondaries
  2. Over Four Tons Of Tubes
  3. L channel lower output?
  4. 16LS Amp by S5 Electronics Questions
  5. Heathkit WM-5
  6. 6BL8 not on roll chart
  7. CJ PV-5 PS rebuild
  8. Attenuator for passive pre (LEAK ST 20)
  9. Help ID tubes Plz
  10. Data sheet and load line question
  11. Trouble with Silver to Black face twin mod.
  12. Grommes S35 booster amp output?
  13. dc filament heater - high impedance const. voltage
  14. Schematic for Modwright SWL 9.0se Preamp
  15. GZ37 substitutes
  16. output attenuation
  17. My humming home made tube amp
  18. Shared Cathodes 300b
  19. Bogen CHB-35 for Music...
  20. correctly connecting PT for 110/220 volts
  21. voltage divider
  22. "Bypass caps" and their effect on perceived sound
  23. Repair of Cayin HA-2 Tube Headphone Amp
  24. Best Drive for EL34
  25. Needing Schematic for Grommes LJ7 please.
  26. 6550C v. KT88
  27. ECC81 MU-Follower consumption
  28. Locating hum source
  29. c3g self oscillation problem - a newbie needs help!
  30. Voice of music console help
  31. One tube radio
  32. Triodes with better "look&feel"
  33. HV Supply
  34. Will this arrangement impact the input impedence of the cathode follower?
  35. Measuring preamp output impedance
  36. Capacitor from 120VAC to ground
  37. I have power but no sound???
  38. Using a function generator with a tube amp?
  39. What resistors to use on KT88s tubes?
  40. Opinions on Raysonic sp-200 + Raysonic 168 CD
  41. Lab power supply for testing tubes
  42. Could really use some help here!
  43. Help~ GU50 ?
  44. Some Power Supply Help
  45. newbies beware of lampizator srpp pdf
  46. Headphone output
  47. Has anyone played around with this as an amp front end?
  48. Help for Dynavox VR-70E
  49. Heathkit TT-1 (testing a 199, 99 tube)
  50. Tube And Transformer I/V Converter For Differential Current DAC
  51. Volume increases as amp warms up
  52. New 6V6 Build - Suggestions Needed
  53. Tubes Numbers
  54. VTL
  55. Visit to KR audio Prague 20120921
  56. Where did he posted it?
  57. Problems with PT325.2i
  58. What phono preamp with Dynaco MKIII
  59. opinions on supporting a past sale/trade deal
  60. Series connection of regulator tubes
  61. Preamp buzzes when volume is at zero?
  62. Hrrrrmphhhff. PSU design error and how to cope with it
  63. 300B fixed bias specs
  64. Battery filament for 4P1L
  65. Need pro help with this tube amp.
  66. Need help with UTC transformer
  67. Very interesting 300b design
  68. How to understand the power output in this case?
  69. K12G Help
  70. all dht se PX4
  71. multiple output transformers per channel
  72. What would you change in this schematic? (PP amp)
  73. Anyone know where to get this type of breadboard?
  74. moscode 600 tube recommendations
  75. Should I use two separate OPTs for parallel output tubes?
  76. custom Tube chassis vendor
  77. VLS631 Thermal Delay
  78. 6au6 preamp stage
  79. Recognize this tubes...
  80. need help for my new amp: 6G6G driver & 807 SE
  81. Anyone heard of radiometal for transformer core?
  82. BCF-2
  83. Glowing Plates of Doom
  84. Modding Aikido to non-Aikido such as SRPP?
  85. DN2540 plate load.
  86. Help! Did my power cable blow his tubes?
  87. 211 amp SRPP driver
  88. Tubelab SE problem
  89. tube to replace opamps in cd player
  90. Jolida 302b started to crack/pop once a minute
  91. why it doesn't work - 300B SE power amp
  92. Trio KW-70 schematic also known as WX-400 under kenwood name
  93. New DC to AC to high voltage AC idea?
  94. LED bias for 6N1P driver
  95. DIY tube amp general inquiry
  96. 6as7 Aikido headphone amplifier
  97. Cold tubes in warm amp = smoke?
  98. Keroes: Direct-Coupled amplifier
  99. Tube ID help please.
  100. exactly HOW does a tube amp work? or a vacuum tube?
  101. David Berning's zh-230 - whats going on here?
  102. EICO HF86 scratch build question please
  103. what to do with a 12W 600ohm to 4/8 ohm output transformer?
  104. Telewatt VS71M
  105. Yamamoto 09S 300B SE Amp Problem
  106. Marantz-9
  107. 6V6 amp question
  108. Wood chassis
  109. My first project SE(T) into high end audio.
  110. Supermalloy for the Power transformer?
  111. Can I build a screen reg. with IXYS 10M45?
  112. Modified DynacoMkIV
  113. Refurbising Conrad Johnson Premier One
  114. Would using a 16ohm speaker damage my SE output transformers?
  115. Grommes/PE S-35 questions
  116. Concertina phase inverter with LED bias - is this completely wrong?
  117. Parafeed turn-on delay
  118. I'm looking for 6an8 (as V1) schematics
  119. New Project - EL84 PP and preamp - suggestions welcome
  120. The sound of modern transformers compared with vintage gear
  121. Determining the core cross sectional area, Afe, for SE OPT
  122. HT power supply high?
  123. under-run push pull
  124. 12B4 Linestage Woes
  125. Transcendent Sound Mini-Beast
  126. A Question About Positive Feedback
  127. Help with opera consonance M100plus
  128. Just received 2x PT Choke OT. best implementation ?
  129. Just received 2x PT Choke OT. best implementation ?
  130. Mystery Valve ID
  131. Oddball OT with extra secondary winding
  132. Help with Multi Section Can Cap replacement
  133. 600V bench variable supply to test transmitting valves
  134. Heater-cathode voltage spec interpretation
  135. Tell me why this wont work.
  136. headphone amp for Senns HD600
  137. Transformer orientation and suggestions.
  138. 12AU7 stereo SE mini-amp build!
  139. allen type 20a schematic
  140. 2010 lemon year for EH 6922 tubes
  141. Chinese GU50 PP
  142. Gain, Vpp and attenuation at each stage
  143. 6n14p headphone amp
  144. Heater Lifter
  145. KT88 & 6550 Pentode power output?
  146. Biasing Improved Williamson
  147. Lowering the Volume Control on Tube Amps
  148. Got the Hum out!! Thanks All
  149. How hot KT88 get? Anybody take a reading?
  150. Broskie Unbalancer
  151. Phase splitting transformer design
  152. Red plate KT88
  153. 6N16B preamp
  154. Eimac 450th nos
  155. how much clearance above tubes for KT88 enclosure
  156. Cathode preheating???
  157. RIAA Question - Power
  158. Linearity of Red RCA 5692
  159. What gauge enclosure for KT88 AMP?
  160. Output Transformer Issue???
  161. Maggie 8802 placement issue
  162. Can you recommend a tube tester?
  163. 6550 tube protection socket
  164. PT laminations are usable as OT laminations ?
  165. Are These Authentic Russian Military 1578 Vacuum Tubes?
  166. Amp ID Please
  167. Help for Main Transformer Spec for CCDA
  168. Switching SE and balanced inputs/outputs
  169. kt88 PP rectifier.
  170. How much Blue glow is ok?
  171. Recommendations on How To mono a pre amplifier?
  172. 6H6pi curves available?
  173. 1p24b
  174. help, Built from scratch Kalamazoo 2 noise
  175. 5CZ5/5BQ7A single ended amp
  176. Hopefully a simple question.
  177. 211 tube recommendations
  178. Need HELP with TUBE IMP
  179. Another unknown tube
  180. Triode Bias 101
  181. Bogen MO-200A transplant /conversion
  182. 5U4 o bridge rectifier
  183. Choosing the right transformer
  184. V-Cap Help
  185. Older tubes sound better
  186. 6J7 preamp
  187. Menygue mini/music angel amp
  188. Driving a Behringer INuke Nu1000
  189. cathode follower ecc88 on 60volt
  190. Docs for Heathkit AA-23?
  191. 45 tube amp schematic
  192. Old TO-R s15u, Should i fix it?
  193. Tube ID
  194. VTL driver tube question
  195. Fun with junk EL84 SE
  196. Enclosure ideas
  197. Burn in procedure for NOS necessary?
  198. Strange Lorenz ECC81 12AT7
  199. Amplifier first start up; Plays tone of signal generator with no speakers!
  200. Reports of the death of Audiophool have been greatly exaggerated
  201. help me identify some vintage tubes // need suggestions for possible applications!
  202. Lowering cost of audio output transformer
  203. Source for transformers in Europe
  204. morgan Jones HT caps & Anode Loads
  205. Tuning Negative feedback
  206. Hickok reference 6L6 for calibration..
  207. SET-NO FEEDBACK amplifier performance
  208. Stereo class A 6+6W - 2x 6L6G 1 x 6N2P
  209. Console Amplifier Pull:Voltages over Spec
  210. Help! My EL34B based amp arced at full volume.
  211. MUZAK 50's tube amp
  212. Tube break-in?
  213. Custom power tranny specs recommendations for 300B pse monoblocs
  214. mosfet source follower output stage.
  215. Winter upgrade project - new heating unit
  216. 6KM8 amp
  217. Power and output transformers to ground.
  218. Help with this schematic? B+? B++?
  219. What to do with this old amp? suggestions please.
  220. DIY CAT SL1 preamp
  221. Phase inverter, your comments welcomed!
  222. Basic Bias Question for PP Amp
  223. Oddwatt 5751/6550
  224. Please help me to identify Telefunken PCC ...
  225. Modification of 300B SE Amplifier
  226. 300B Tube and Amp Questions
  227. ST70 "Imposter"
  228. cathode follower question
  229. marconi tubes....can someone idntify these
  230. DeathTrap400 : : A Pretty Damn Good 300B Amp
  231. SOS: First Build, Lots of Hum
  232. KR Audio Marconi R valve amp?
  233. Distortion
  234. Tung-Sol 6098/6AR6 Substitution
  235. Dropout in RTP3 phono stage
  236. Audio Research EC-3 modification
  237. 300b all-DHT SET
  238. My first tube project !
  239. Trouble with homebuilt amp
  240. Music angel el34b problem
  241. The end of tubes?
  242. Two stages EL34 power amplifier
  243. 7199 replacement in AMPEX 6973
  244. IT coupled tube-SS hybrid amp suggestion- needs development
  245. Original Cary CAD-300se upgrades?
  246. Convert Integrated Tube Preamp to an amplifier
  247. McCurdy AM405 Schematics
  248. Looking for Neumann N149 power supply schematic
  249. B&K model 747 tube tester for EL34
  250. Behringer DEQ2496 for testing amplifiers and preamps frequency response ???

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